Upper tumbler for dredges and the like.



No. 5,795. IPATENTED MAR. 5, 1907.

SY.VL.G.KNOX.

UPPER TUMBLER FOR DREDGES AND THE LIKE. APPLIOATION FILED MAR. 26. 1906.

UNITED srA'rns PATENT FFICE.

SAMUEL LIPPINCOTT GRISWOLD KNOX, OF MILWAUKEE, WISCONSIN, AS- SIGNOR TO THE BUCYRUS COMPANY, OF SOUTH MILWAUKEE, VVISCON- SIN, A CORPORATION OF WISCONSIN.

UPPER. TUIVIBLER FOR DREDGES AND THE LIKE.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed March 26, 1906. Serial No. 308,147.

To a whom it may concern.-

Be it known that I, SAMUEL LIPPINCOTT GRIswoLD KNox, a citizen of the United States, residing in the city and county of Milwaukee, State of Wisconsin, have invented certain new and useful Improvements in Upper Tumblers for Dredges and the Like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. i

The invention relates to tumblers for bucket-chains, and more particularly to upper tumblers for elevator dredges, excavators, "and the like, and has for its object to provide means for supporting the wear-plates which it is customary to apply to tumblers of this character against tangential strain oi the bucket-chain and "to prevent the wearplates shearing off their securing bolts or riv ets and also to provide the tumbler with cushion-plates interposed between the tumbler-faces and the wearplates, said cushionplates being-conveniently constructed to en gage adjacent faces of the tumbler-drum and having tongue-and-groove connections with the drum-faces to hold the cushionplates securely in position on the barrel and resist the shearing strains imposed by the bucket-chain.

In the drawings, Figure 1 is a side elevation of the tumbler-drum, showing two sets oi cushion and wear plates applied thereto, one of said sets being in section. Fig. 2 is a plan view of one of the cushion-plates. Fig. 3 is an end view thereof. Fig. 4 illustrates in plan and edge view one of the wear-plates.

Referring to the drawings, (1 indicates the tumbler as a whole, which consists of a hubsection I), having an outlying rim 0, which is given the usual polygonal form common to tumblers of this type and which is conveniently constructed as a hexagonal prism.

' Each of the drum-faces is provided with two grooves d and e, which may extend transversely throughout the entire width of the drum-face or may, if desired, be made shorter than the width of the drum-faces, as convenience or necessity may dictate.

The tumbler-drum is preferably provided with cushion-plates, which may conveniently be formed with two base portions 9 and h, which engage with adjacent faces of the drum, as shown, and the lower surface of the portions g and h are provided with tongues or ribs d and 6, respectively, which engage the corresponding grooves d and e in the cooperating dri1m;taces. This construction affords a simple and effective locking engagement between the cushion-plate and the cooperating drun1iaces, by means of which the cushion-plate is held much more securely to the tumbler-barrel than by the old expedient of bolts or rivets, and the extended shearingsurface presented by the tongue-and-groove engagement between the cushion-plate and the drum-faces directly resisting the tangential pull of the bucket-chain ailords an excellent means for preventing the tendency oithe cushionplates to break away from the barrel by shearing oil the securing rivets or bolts. Member h oi the cushion-plate is extended beyond the intersecting plane of the upper face or member 9 to constitute a bearing or the engaging portions of thebucketchain which overhangs the succeeding lace of the tumbler. This overhanging bearing-face is strengthened by means of integral ribs 7', which extend from the under side or the bearing-i'ace to the upper face of member g.

It will be obvious that the portion of the face h which is operatively engaged by the bucket-chain may be hardened to resist wear; but in its more convenient embodiment the cushionplates, which constitute in themselves a renewable element of the tumbler, are provided with renewable wear-plates which come directly in contact with the bucket-chain. These wear-plates are preferably formed of nickel-steel or other wear-resisting material and are attached to the cushionplate by means of bolts or rivets, so that they may be readily removed or replaced. In order to provide an accurate seat for the several wear-plates p, the face h of the cushionplate is furnished with lugs or ears n, which define the position of the wear-plates p with respect to the face It and the overhanging extension thereof, m.

It has been found that the heavy tangential strain imposed upon the wear-plates by the operation of the bucket-chain tends to cause the wear-plates to shift position and shear off the securing bolts or rivets. In order to overcome this tendency and to prevent the wear-plate shearing the securing-bolts, there is provided an upwardly-projecting transverse shoulder or lug l, which may be conveniently located at the rear edge of the overhanging portion of the cushion-plate, against which shoulder or lug the lateral edge of the wear-plate p bears. As practically all of the strain on the tumbler is imposed in the direction of pull of the bucket-chain, it will be apparent that this strain will. be taken up by the shoulder or lug 1, which will effectively relieve the rivets securing the wear-plate to the tumbler-face from shearing strain. While the lug or shoulder 1 has been illustrated and described as applied to the rear edge of the overhanging face of the cushion plate, it is to be noted that the invention is not limited to such specific application, for the apparent reason that the said shoulder Z might be applied to the wear-plate itself to engage the opposite end of the cushion-plate or even an appropriate groove in the cushionplate or in the drum-face, or, in the alternative, any suitable tongue-and-groove arrangement between the cushion-plate and the wearplate or between the tumbler-face and the wear-plate would fall within the scope of this invention.

It is to be observed that,'if desired, the

cushion-plates as separable elements of the tumbler or drum may be dispensed with or, rather, that those portions of the tumbler which are included within the structure of the cushion-plates, as hereinbefore described, may be formed as integral portions of the tumbler, under which circumstances the wear-plates w1ll be secured directly to the tumbler or drum faces and the necessary shouldered engagement will be provided between the wear-plates and the drum-faces to resist the tangential strain of the chain.

What I claim is 1. A tumbler for bucket-chains, comprising a polygonal drum, a wear-plate on each face to engage the bucket-chain, and a transverse shouldered engagement between the wear-plates and the drum-faces to resist the tangential strain of the chain.

2. A tumbler for bucket-chains, comprising a polygonal drum, and wearplates on the drum-faces, said wear-plates and drum-faces having shouldered engagements to resist tangential strains on said wear-plates.

3. A tumbler for bucket-chains, comprising a polygonal drum, each drum-face overhanging at one end the next adjacent drumface, a wear-plate on each face, and a shouldered engagement between each wear-plate and the corresponding drum-face.

4. A tumbler for bucket-chains, comprising a polygonal drum, each drum-face overhanging at one end the next adjacent drumface, a wear-plate on each face, and a shoulder or lug on the drum-face engaging the wear-plate to support said wear-plate against tangential strain.

5. A tumbler for bucket-chains, comprising a polygonal drum, each drum-face overhanging at one end the next adjacent drumface, a wear-plate on each face, and a shoulder or lug on the edge of the overhanging portion of each drum-face to engage the end of the corresponding wear-plate and support said wear-plate against tangential strain.

6. A tumbler for bucketchains, co1npris ing a polygonal drum, cushion-plates cooperating with said drum and each engaging adjacent faces of said drum, and tongue-andgroove connections between each cushionplate and the adjacent drum-faces.

7. A tumbler for bucket-chains, comprising a polygonal drum, cushion-plates cooperating with said drum and each engaging adjacent faces of said drum, and transverse tongue-and-groove connections between each cushion-plate and the adjacent drum-faces.

8. A tumbler for bucket-chains, comprising a polygonal drum, cushion-plates cooperating with said drum and each having angularly-disposed base portions engaging adjacent faces of the drum, and tongue-andgroove connections between each cushionplate and the adjacent engaging faces of the drum.

' 9. A tumbler for bucket-chains, comprising a polygonal drum, cushion-plates c0operating with said drum and each having angularly-disposed base portions engaging adjacent faces of the drum and a bearing-face forming an extension of the drum-face and overhanging the next adjacent drum-face, and tongue-and-groove connections between the faces of the drum and the base portions of the cushion-plates ahead of the bearingfaces.

10. A tumbler for bucket-chains, comprising a polygonal drum, cushion-plates cooperating with the drum, each of said cushionplates having angularly-disposed portions engaging adjacent drum-faces and a bearing portion forming an extension of the drumface and overhanging the next adjacent drum-face, a tongue-and-groove connection between each drumface and the portion of the corresponding cushion-plate in advance of the bearing portion thereof, and a wear plate secured to the bearing-face of the cush- I ion-plate.

1 1. A tumbler for bucket-chains, comprisa polygonal drum, cushion-plates coopering ating with the drum, each of said cushionplates having angularly-disposed portions engaging adjacent drum-faces and a bearing portion forming an extension of the drumface and overhanging the next adjacent drum-face, tongue and groove connections between each cushion-plate and the adjacent engaging faces of the drum, and a Wear-plate secured. to the bearing-face of the cushionplate.

12. A tumbler for bucket-chains, comprising a polygonal drum, cushion-plates cooperating With the drum; each of said cushionplates having angularly-disposed portions engaging adjacent drum-faces and a bearing portion forming an extension of the drumface and overhanging the next adjacent drum-face, a Wear-plate secured to the bearing-face of the cushion-plate, and a shouldered engagement between each Wear-plate and the corresponding cushion-plate.

13. A tumbler for bucket-chains, comprising a polygonal drum, cushion-plates cooperating With the drum, each of said cushionplates having angularly-disposed portions engaging adjacent drum-faces and a bearing portion forming an extension of the drumface and overhanging the next adjacent ing-face of the cushion-plate, and a shoulder or lug on the cushion-plate engaging the Wear-plate. l 14. A tumbler for bucket-chains, l ing a polygonal drum, cush.ion- ;)lates, coopcrating with the drum, each of said cushion- I plates having angularlydisposed portions drum-face, a Wear-plate secured to the bearl l comprisengaging adjacent drum-faces and a bearing portion forming an extension of the drumface and overhanging the next adjacent r drumface, a Wear-plate secured to the bearing-face of the cushion-plate, and a transverse shoulder or lug on the rear edge of the cushion-plate, against Which the plate abuts. In testimony whereof I aflix my signature in presence of two Witnesses.

SAMUEL LIPPINCOTT GRISVOTJD KNOX. Witnesses HARRY B. HAYDEN,

j RIDGELY FLETCHER. 

